Welding rod



March 12, 1935. s. w. MILLER 1,993,852

WELDING ROD Original Filed Feb. 6, 1928 fiig INVENTOR MQMM, -%%,W,

ATTORNEYS.

Patented Mar. 12, 19 35 UNITED STATES WELDING ROD Samuel W. Miller,deceased, late of Hollis, N. Y., by Ella Z. Miller, executrix, Hollis,N. Y.; said Samuel W. Miller, assignor, by mesne assignments, to OxweldAcetylene Company, a corporation of West Virginia Original applicationFebruary 6, 1928, Serial No. 252,314, now Patent No. 1,873,847, datedAugust 23, 1932. Divided and this application May 26, 1932, Serial No.613,726

4Claims.

This application is a division of a copending application of Samuel W.Miller, Serial No. 252,314, filed February 6, 1928, and patented August23, 1932, Number 1,873,847.

This invention relates to improvements in metallic welding rods adaptedto be fused by means of a high temperature gas flame or an electric arcand deposited on heated solid metal for the purpose of welding, flllingor the like.

Generally speaking, the thickness of the work being welded by a gasflame, such as an oxyacetylene flame, determines the size of the weldingflame which should be employed, although practical difliculties areencountered in designing very large welding nozzles or heads for weldingvery thick work, so there is a practical limit to the size of thewelding flame which may be produced. It has been customary to use asingle round metallic rod for welding purposes, but welding rods of verylarge diameter are seldom carried in stock or used for welding, nomatter how thick the work may be or what the size of the flame may be.For example, the usual rod for welding steel of all thicknesses fromone-half inch up is one-quarter inch in diameter. Considerable heat istherefore wasted and progress is slow when the usual single round wireis used with larger flames for welding the thicker work. For heavy steelwelding, where a large flame is required to keep the work properlyheated, two

. one-quarter inch rods have been secured together parallel to eachother by binding wires. The objection to this wiring together is thatthe welder almost always bends the rods at some point about nine inchesfrom the workto avoid the strain 01' holding straight rods nearlyvertical to the work and to keep his hand holding the rods from theheat. This bending of the two wired-together rods causes the ends thatare being melted oiT to separate, resulting in delays and dimculties inmanipulating the rods.

The principal object of this invention is to provide an improved weldingrod whereby weld metal may be more rapidly and economically depositedthan in the use 01' the common welding rod'of circular cross-section,especially when welding metal of considerable thickness or when flllinglarge cavities. Another object is to provide a welding rod of largercross-section area than the well-known circular welding rod, and toprovide a rod which has one axis of its cross-section longer than theaxis perpendicular thereto, and one which preferably is thickerintermediate its lateral edges than adjacent such edges, whereby (1)less gas or electric current is consumed per pound of metal deposited,(2) the heat of the welding flame may be conflned and more fullyutilized, (3) the hottest part of the welding flame may be applied tothe thickest part of the rod, and (4) welding may be facilitated byturning the rod about its central longitudinal axis as occasion demandsto present either the narrow or the wider side of the rod to theV-shaped groove between the bevelled edges of the work to be welded.

The above and other objects and the novel features of this inventionwill be apparent from the following description and the accompanyingdrawing, in which:

Figs. 1 to 5 inclusive are cross-sectional views of metallic weldingrods embodying various features of this invention.

As already stated, certain objections are encountered in welding withtwo rods wired together. When such rods are bent to provide a handlewhereby the welder may conveniently hold them at the desired inclinationto the work, the rods, especially at the heated ends, spread apart,impeding the welder in his work as well as causing non-uniform welds. Toovercome such objections there are permanently united in parallelvcontacting relation two or more rods of the same length, as shown inFigs. 1 to 4 inclusive. The permanent unions between the severalparallel rods may consist of spot welds at short intervals apart, saytwo inches, throughout their length; or a continuous longitudinal jointbetween the parallel rods may be produced by electric resistancewelding. Two or more welding rods permanently joined together in thisway may be bent as desired and will stay together. As shown in Fig. 1,the rods 15 and 16 are permanently united by a longitudinal joint 1'7;in Fig. 2, the rods 18, 19 and 20 are permanently united into a unitarywelding rod by longitudinal joints 21 and 22; in Fig. 3, the rods 23, 24and 25 are arranged with their longitudinal axes at the apexes of atriangle and are permanently united into a unitary rod by longitudinaljoints 26; 2'7 and 28; while the rods 29, 30, 31, 32, forming theunitary welding rod shown in Fig. 4, are united by longitudinal joints33, 34 and 35. In all instances, the joints may be either spot welds orcontinuous resistance welds, and if desired, the spaces on oppositesides of the joints throughout the length' of the composite rods may befilled with suitable fluxing material level with planes tangent toadjoining rods, as indicated at 36 in Figs. 2 and 4 for example.Similarly, suitable flux may be introduced into the space between therods of Fig. 3, as indicated at 37, with or without flux in the outerv-shaped spaces adjacent the joints 26, 27 and 28. The flux is thuscarried by and distributed throughout the length of the composite rodand is automatically supplied to the weld as required.

It will be observed that the welding rods shown in Figs. 1 to 5inclusive are considerably wider than a single rod of circularcross-section having the same area. In gas welding especially, it isdecidedly advantageous to employ a welding rod having onecross-sectional dimension substantially greater than the other.Particularly on this work, welding with the common single rod isuneconomical and slow because a large proportion of the heat passes therod and is not eifective in melting the rod nor sufllcient to keep thebase metal in a state of fusion to receive the melted rod depositedthereon. By presenting the improved composite rod to the work in such amanner that its broad side faces the weld, more of the flame and heatare confined between the rod and the weld. and reflected back to thework and weld, so that heat otherwise wasted may be utilized for meltingthe rod and keeping the weld and base metal at a fusion temperatureresulting in faster welding and greater economy. Moreover, by turningthis type of rod so as to present its narrow side to the bottom of theV-groove, the welder may get to the bottom of the groove as easily aswith a single round rod.

In some welding operations it is advantageous to provide the welding rodwith a concave lower face which serves to confine the heat better than aflat broad face. In Fig. 4, for example, the several rods 29, 30, 31 and32 are permanently united so their longitudinal axes and the weld unionslie on a curve, whereby one side of the composite rod is concavethroughout its length. Another type of welding rod embodying thisfeature is shown in Fig. 5, wherein the' rod 40 consists of asubstantially rectangular metal strip rolled, bent or otherwise groovedso as to form a concave side 40', extending lengthwise oi the rod.

While it is desirable in most instances that the plurality of integrallyunited rods shown in Figs. 1 to 4 shall have the same metalliccomposition, rods of diiferent composition may be united in the samemanner to provide a composite rod that will deposit weld metal of acomposition that diifers from any of the individual rods which make upthe unitary rod.

For convenience, herein there is designated the width dimension takenperpendicular to the longitudinal axis of the rod, and the thicknessdimension as the minor sectional axis.

What is claimed is:

1. 'A welding rod having a cross-section concave on one side and convexon the other side.

2. A welding rod comprised of a plurality of individual rods of circularcross-section, said rods being secured to each other at intervals alongtheir length and arranged with their center lines lying in a cylindricalsurface the width ot'the assembled rod being greater than its thickness.

3. A welding rod composed of a plurality of straight individual rods ofcircular cross-section, the individual rods being secured to each otheralong their length in such manner as to form a portion of a cylindricalsurface and the width of the assembled rod being greater than itsthickness.

4.- A welding rod comprising a plurality of straight rods of circularcross-section arranged side by side in such manner as to form a portionof a cylindrical surface, said rods being of substantially identicalcomposition and melting temperature and being secured to each other; anda fluxing material in the spaces between said rods; the width of theassembled rod being greater than its thickness.

' ELLA Z. MILLER. Ezecutrix of the Last Will and Testament of Samuel W.Miller, Deceased.

